TW356636B - A receiver and a method of operating an AGC system in a receiver - Google Patents

A receiver and a method of operating an AGC system in a receiver

Info

Publication number
TW356636B
TW356636B TW086114570A TW86114570A TW356636B TW 356636 B TW356636 B TW 356636B TW 086114570 A TW086114570 A TW 086114570A TW 86114570 A TW86114570 A TW 86114570A TW 356636 B TW356636 B TW 356636B
Authority
TW
Taiwan
Prior art keywords
receiver
average
operating
symbol
levels
Prior art date
Application number
TW086114570A
Other languages
Chinese (zh)
Inventor
Gopalan Krishnamurthy
Rudolf Turner
Original Assignee
Zenith Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zenith Electronics Corp filed Critical Zenith Electronics Corp
Application granted granted Critical
Publication of TW356636B publication Critical patent/TW356636B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/52—Automatic gain control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3078—Circuits generating control signals for digitally modulated signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Television Receiver Circuits (AREA)
  • Dc Digital Transmission (AREA)

Abstract

A method of operating an AGC system in a receiver having multiple digital signals with different average magnitudes of data symbol levels and average sync symbol levels; the method comprises processing a receiving signal to determine an average symbol level and prevent any difference in the sync symbol levels from affecting the determined average symbol level; and using the determined average symbol levels to generate a AGC voltage.
TW086114570A 1996-10-07 1997-10-06 A receiver and a method of operating an AGC system in a receiver TW356636B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/726,597 US5764309A (en) 1996-10-07 1996-10-07 Sync compensated AGC system for VSB receiver

Publications (1)

Publication Number Publication Date
TW356636B true TW356636B (en) 1999-04-21

Family

ID=24919252

Family Applications (1)

Application Number Title Priority Date Filing Date
TW086114570A TW356636B (en) 1996-10-07 1997-10-06 A receiver and a method of operating an AGC system in a receiver

Country Status (8)

Country Link
US (1) US5764309A (en)
JP (1) JP2000502541A (en)
KR (1) KR100284802B1 (en)
CN (1) CN1102007C (en)
CA (1) CA2239886C (en)
HK (1) HK1017202A1 (en)
TW (1) TW356636B (en)
WO (1) WO1998016064A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442232B1 (en) * 1997-08-28 2004-09-18 엘지전자 주식회사 Automatic gain control device of hdtv reducing gate size upon asic
DE19753773A1 (en) 1997-12-04 1999-06-10 Basf Ag Process for the production of chlorocarboxylic acid chlorides
KR20000018531A (en) * 1998-09-02 2000-04-06 구자홍 Transmitter/receiver apparatus of a digital television
WO2000019673A1 (en) * 1998-09-28 2000-04-06 Matsushita Electric Industrial Co., Ltd. Vsb receiver
US6606129B1 (en) * 1998-12-04 2003-08-12 Samsung Electronics Co., Ltd. Digital filtering of DTV I-F signal to avoid low-end boost of the baseband signal resulting from in-phase synchrodyne
KR100304889B1 (en) * 1998-12-31 2001-09-24 구자홍 Apparatus for detecting vsb mode of digital tv
US6239848B1 (en) * 2000-01-05 2001-05-29 Zenith Electronics Corporation HDTV receiver having fast digital IF AGC and analog RF AGC
KR100320481B1 (en) * 2000-01-27 2002-01-12 구자홍 Apparatus generating AGC signal
KR100672561B1 (en) * 2000-09-22 2007-01-23 엘지전자 주식회사 Communication system of digital TV
KR102494784B1 (en) 2015-07-28 2023-02-01 삼성전자주식회사 Receiver and operating method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4625240A (en) * 1984-07-25 1986-11-25 Eeco, Inc. Adaptive automatic gain control
US5267272A (en) * 1988-10-24 1993-11-30 Hughes Aircraft Company Receiver automatic gain control (AGC)
US5508748A (en) * 1993-02-08 1996-04-16 Zenith Electronics Corporation Data level selection for multilevel VSB transmission system
JP3183078B2 (en) * 1994-02-28 2001-07-03 三菱電機株式会社 Control signal generation circuit, automatic gain control circuit using the same, receiver using the same, and communication system using the same
US5565932A (en) * 1994-11-08 1996-10-15 Zenith Electronics Corp. AGC system with pilot using digital data reference
US5636250A (en) * 1994-12-13 1997-06-03 Hitachi America, Ltd. Automatic VSB/QAM modulation recognition method and apparatus

Also Published As

Publication number Publication date
JP2000502541A (en) 2000-02-29
CN1102007C (en) 2003-02-19
CN1205152A (en) 1999-01-13
US5764309A (en) 1998-06-09
HK1017202A1 (en) 1999-11-12
KR19990067284A (en) 1999-08-16
KR100284802B1 (en) 2001-03-15
WO1998016064A1 (en) 1998-04-16
CA2239886A1 (en) 1998-04-16
CA2239886C (en) 2003-11-18

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Legal Events

Date Code Title Description
MK4A Expiration of patent term of an invention patent